Wood-Plastic Composite Panel Adhesion via Embedded Mesh

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Solution Overview

Problem

Current manufacturing techniques for wood-plastic composite materials result in panels with smooth surfaces that resist adhesion of conventional adhesives, making it difficult to securely attach additional layers like thin plastic films, and require extensive facilities and cooling mechanisms, limiting panel size and durability.

Innovation Solution

A pressing apparatus with converging platens and conveyor belts compresses and cools molten composite material, embedding a mesh on the surface to create an adhesive-friendly interface, allowing secure attachment of secondary films without pre-treatment, and producing denser, stronger panels suitable for construction.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Strength

If conventional extrusion processes are used to manufacture wood-plastic composite panels, then the panels achieve durability and strength, but the surface becomes smooth and oily which resists adhesive attachment

Engineering Contradiction:

Improvepanel durabilityVSAvoidadhesive attachment ease

Core Design Contradiction:

StrengthVSEase of manufacture

Solution Approach 1:

The mesh is embedded into the composite material surface during the extrusion process itself, before the panel is complete. This preliminary action creates an adhesive-friendly surface texture that will facilitate later film attachment without requiring subsequent surface treatment steps.

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

A mesh material serves as an intermediary between the smooth composite surface and the adhesive. The mesh provides a textured interface that improves adhesive bonding while being integrated into the composite structure, acting as a mediator that solves the adhesion problem without compromising panel strength.

Inventive Principle:

Principle #24Intermediary (Mediator)

2Temperature

If traditional cooling mechanisms are used after extrusion, then the panel cools and solidifies, but extensive facility space is required and panel thickness is limited

Engineering Contradiction:

Improvepanel coolingVSAvoidfacility requirements

Core Design Contradiction:

TemperatureVSDevice complexity

Solution Approach 1:

The cooling function is merged with the extrusion process itself. The extrusion apparatus incorporates cooling capabilities that allow the panel to cool and solidify within the same equipment used for extrusion, eliminating the need for separate, extensive cooling facilities and allowing greater panel thickness.

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The extrusion apparatus is designed to perform multiple functions: extruding the composite material, shaping the panel, and cooling it to solidification. This multi-functional approach reduces facility requirements and simplifies the manufacturing process while allowing production of thicker panels.

Inventive Principle:

Principle #6Universality (Multi-functionality)

3Shape

If the composite surface is left smooth from extrusion, then the panel maintains a clean finish, but conventional adhesives cannot securely attach to it

Engineering Contradiction:

Improvesurface smoothnessVSAvoidadhesive bond strength

Core Design Contradiction:

ShapeVSReliability

Solution Approach 1:

The mesh is applied locally to the surface region where adhesive attachment is needed, rather than changing the entire panel structure. This allows the surface to maintain its clean finish appearance while providing localized texture improvement for adhesive bonding in the specific areas where films will be attached.

Inventive Principle:

Principle #3Local quality

Applied Scientific Principles

This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.

Function Achieved in This Case

The method enables the production of durable, dense wood-plastic composite panels that can securely adhere thin films using conventional adhesives without pre-treatment, overcoming adhesion issues and facilitating larger, more robust panel fabrication with reduced facility requirements.

Implementation Method 1

conveyor belts, movably disposed along opposing surfaces of said platens, move molten composite material through the decreasing gap to compress the molten composite material between the platens

Methodology Applied

Scientific EffectCompression: Compression

Implementation Method 2

The gap decreases uniformly from first ends of the platens toward second ends of the platens... move molten composite material through the decreasing gap to compress the molten composite material

Methodology Applied

Scientific EffectCooling: Cooling

Data Source

PatentUS9573310B1Method for making a durable wood-plastic composite panel upon which plastic films may be readily and securely adhered

Publication Date: 2017.02.21 ARCHULETTA PHIL T

AI summary

An apparatus and method for fabricating a panel from a molten composite material, and a panel product fabricated accordingly. Two platens in spaced relation define a gap which decreases uniformly from first ends of the platens toward second ends of the platens. Molten composite material is moved through the decreasing gap to compress the material between the platens. Cooling drums cool the composite panel shortly after extrusion. A mesh is rolled into a surface of the extruded panel; the screen remains partially exposed on the panel surface to provide a panel surface amenable to the application of adhesives.